Home / 5,939.60-8,909.40-3,981.20

Finding the Fourth Proportional to 5,939.60, 8,909.40 and 3,981.20

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Solution

The fourth proportional to 5,939.60, 8,909.40 and 3,981.20 is: 5,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,939.60 : 8,909.40 = 3,981.20 : x
  2. Step 2: Convert to fraction form
    5,939.60/8,909.40 = 3,981.20/x
  3. Step 3: Cross multiply
    5,939.60x = 8,909.40 × 3,981.20
  4. Step 4: Simplify right side
    5,939.60x = 35,470,103.28
  5. Step 5: Solve for x
    x = 35,470,103.28/5,939.60
  6. Step 6: Final answer
    x = 5,971.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.